C# insert into Oracle

I am new at this and need help with what I hope is a simple question.  I have a C# app that needs to insert records into an Oracle db.  The code I have runs without error but does not actually insert a record.  Here is my code so far.

string eEmpID = tbEmpID.Text;
string eFName = tbFName.Text;
string eLName = tbLName.Text;
string eEmail = tbEmail.Text;
string ePhone = tbPhone.Text;
string eHireDate = " ";
string eJobID = ddlJobID.SelectedValue;
string eGrade = ddlGrade.SelectedValue;
                  
using (OracleConnection con = new OracleConnection(Configuration.oConn))
{
con.Open();

string oCMD = "insert into RANDRAPP.EMPLOYEES(EMPLOYEE_ID, FIRST_NAME, LAST_NAME, EMAIL, PHONE_NUMBER, HIRE_DATE, JOB_ID, SALARY, MANAGER_ID, DEPT_ID, TIME_REMAINING) VALUES (eEmpID, eFName, eLName, eEmail, ePhone, eHire_Date, eJobID, eGrade)";

OracleCommand cmd = new OracleCommand(oCMD, con);
}